Finite Element Analysis of Slabs-on-Grade Using Higher Order Subgrade Soil Models

by Lev Khazanovich, Univ of Illinois, Urbana, United States,
Anastasios M. Ioannides, Univ of Illinois, Urbana, United States,

Document Type: Proceeding Paper

Part of: Airport Pavement Innovations—Theory to Practice


Incorporation of the two-parameter, Kerr and Zhemochkin-Sinitsyn-Shtaerman subgrade models into finite element code ILLI-SLAB is described. The two conventional idealizations, namely the dense liquid and elastic solid, are also available in the program library. The purpose of this study is to provide the analytical tools by which to assess the impact of the subgrade model choice in each analysis or design exercise. Results from a few simple case studies are discussed, which suggest that the dense liquid can be an adequate foundation assumption in many cases provided the subgrade modulus, k, is reliably determined. The size of the loaded area emerges as an important parameter.

Subject Headings: Finite element method | Soil analysis | Concrete pavements | Subgrades | Subgrade soils | Dynamic models | Mathematical models | Structural models

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